1) Shiiku no Aijin (The Sheik and the Vixen) - Elizabeth Mayne
The sheik's captive: All aircraft designer Haley Bennett wanted was to deliver the state-of-the-art jet she'd created to its new owner in the Middle East. But then war engulfed the desert kingdom, and suddenly this freewheeling modern woman was a prisoner --- in a palace that was like something from the Arabian Nights.

Prisoner of desire: Her captor was just about the most gorgeous hunk of man she'd ever laid eyes on. But his attitudes --- especially when it came to women --- were straight out of another world. And the most infuriating part was, Sheik Zayn Haji Haaris awakened within her a passion that rocked her world to its very foundations. [Taken from FictionDB:]

1) Hien (A Frozen Fire) - Charlotte Lamb
Paul was a man, but acted like a boy

Helen's husband, Paul was handsome, charming and a gracious companion until one got to know him. Helen's life with him was a long string of disappointments and heartaches.

But she had married him, and in spite of his selfish immaturity, she would honor her vows. She had never contemplated doing otherwise.

Until she met Mark Eliot. He was strong, a man of character and responsibility. Either he was the answer to all her problems or he was the biggest problem she had ever encountered. [Taken from FictionDB:]